Japanese had it bad for 2-3 years. After that they were allowed to live in their country with their own leadership. Palestinians have it bad for 80 years, they are not allowed to return to their homeland, and we expect them to live in closely monitored concentration camps.
A persecuted minority was granted independence from a previously colonial, totalitarian, theocratic state. Since then they have been engaged in an perpetual war of terror.
Japan and Germany had it 'easy' because their defeat was so brutal, and their de-radicalization was so thorough.
Israel's real crime was being too lenient after the 6 days war, exposing themselves and radicalized Palestinians to the violence that's lasted to this day.